超音波の影響による過冷却水の凝固メカニズムに関する研究

抄録

In the previous paper, it was found that the ultrasonic wave has an effect on the freezing of supercooled water under the conditions of the existence of a free surface and insertion of a metal bar. On the other hand, if oil-water interface or no metal bar insertion was selected as experimental condition, there was no influence of the ultrasonic wave on the freezing of the supercooled water even the frequency and the power of the wave were varied. In order to clarify the mechanism of the effect of the ultrasonic wave on the freezing of the supercooled water, authors tried the several experiments. Through the available considerations, it is found that during the application of the ultrasonic wave, the supercooled fog and/or the fine supercooled water drops are produced from the free surface of the supercooled water by the capillary wave and the surface tension wave. It is possible that the high speed supercooled drops clash with the metal bar and/or the floating drops, inducing the freezing of the Supercooled water.